So I need some advice quick.
My ex-gf had cheated on me after 1 1/2 years. I then broke up with her.
I was dubbed a heartless bastard and continuously told to kill myself or that I was a waste of life.

So I finally just left, and stopped talking to her completely.
Now apparently, she is depressed, and the main person who made death threats is trying to talk to me like I'm a friend.

well, isn't a relationship supposed to be full of faithfulness and stuff ??
that's my opinion, and i'm very sure most of the world sees it that way.. if you're allowed to cheat it isn't a real relationship... it's either an open relationship or just.... something...

yea... if you can't agree on that part, then it shouldn't be...
cheating is not okay... if you can't keep your legs shut/dick in your pants, then don't get into a relationship :) guess that's why i don't get into anything ^.^

yes, it's difficult to find trustworthy people...
i always tell the guys not to expect me to stick around for long, cause i get easily tired of being tied down, and i think it makes it easier for them to bear... it's of course always hard, but at least i'm being honest...

Her friends will have her back no matter what. Don't listen to them. Also, anyone on here who told you cheating is okay was probably bullshitting. You're the victim here. I don't really see why you'd want to associate with her or the people that took her side.

Put simply, anyone who tries to justify cheating doesn't deserve a second chance, especially with such a bullshit reason, no matter how many people agree with her. Now if she took responsibility then that would be a good reason to consider forgiving her, otherwise, no, she doesn't deserve the chance, and you don't deserve someone like her.

If this has been going on for 2 months then she's probably telling the truth, no one in the right mind would go through with this for that long without a good reason.
Tell you what, don't forgive her just yet, but talk to her. Tell her to stop asking you for forgiveness, tell her to ask her friends to stop harassing you, and above all tell her what you think about her trying to pin the blame on you. If she actually takes responsibility, then give her another one more chance.
In short, just try to "start over".

I've done all of that. I've tried giving her a second chance, but she wasn't willing to give me one.
I even got more harassed after asking for it to stop.
Her friends have me blocked, and she tells them anything wrong that I do.
No matter what it is or how small, and then they message me and I can't do anything about it.

She seems incredibly selfish, just do what I said before, forget her, and tell anyone on her side to fuck off, and whatever you do, don't give in, or you'll just end up being her little bitch.
(By the way, harassment like that is liable to be classified as cyber-bullying, I.E. illegal, if it keeps up then let someone know, school officials, police, whoever has the most power over her and won' take her side.)

Take a picture of the message as soon as you receive it, or give your phone to the police and let them see the messages first hand, either way, getting them involved could get you out of this, since everyone else is obviously logically impaired.

Tell them your side then, people who are angry are typically impossible to work with, if they're getting less and less angry then you might get the to at least see your side, although taking it is questionable. But that could at least give some leeway, and if you're real lucky things might turn if your favor.
.
Things to emphasize when telling them your side:
Her trying to pin the blame on you and you alone.
Her claiming to care about you and then not listening to you.
Her always hiding behind excuses.
How you wanted her back at one point but her doing the above ended that.